وَحَدَّثَنِي مَالِكٌ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، أَرَادَ الْخُرُوجَ إِلَى الْعِرَاقِ فَقَالَ لَهُ كَعْبُ الأَحْبَارِ لاَ تَخْرُجْ إِلَيْهَا يَا أَمِيرَ الْمُؤْمِنِينَ فَإِنَّ بِهَا تِسْعَةَ أَعْشَارِ السِّحْرِ وَبِهَا فَسَقَةُ الْجِنِّ وَبِهَا الدَّاءُ الْعُضَالُ .
Malik related to me that he heard that Umar ibn al-Khattab wantedto go to Iraq, and Kabal-Ahbar said to him, "Do not go there, amir al-muminin. There is nine-tenths of sorcery there and it is the place ofthe rebellious jinn and the disease which the doctors are unable tocure." Translation Not Available
Book Ref: Muwatta Imam Malik Book 54 Hadith 1795
Web Ref: Muwatta Imam Malik Book 54 Hadith 30